class father:
    name = 'chen'
    def cnb(self):
        print('父类原始版')
class son(father):
    name = 'zhang'
    def cnb(self):
        print('复写后的子类')
d = son()
print(d.name)
d.cnb()

class super_dad:
    name = 'Chen'
    def zb(self):
        print('spuer父亲')
class normal_son(super_dad):
    name = 'Zhang'
    def zb2(self):
        super().zb()
    
son2 = normal_son()
son2.zb2()